Around the globe, ฤทัยมาศ (ฤทัยมาศ 
, Ruethaimas , Ruthaimas ) is a very rare predominantly girly, but very seldom male first name. The first name ฤทัยมาศ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare principally feminine, but very infrequently male name. Much less frequently, ฤทัยมาศ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ruethaimas, Ruthaimas, ฤทัยมาศ | Thailand |